Tire.



W. T. SMITH.

TIRE.

APPLIOATION FILED JUNE 24, 1907.

Patented July 1, 1913.

4 BKEETB-BHBET 1.

INVENTOR.

WITNESSES. /wmd M W. T. SMITH.

TIRE.

APPLICATION FILED mm: 24, 1901.

Patented July 1, 1913.

4 SHEEN-SHEET 2.

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TIRE.

' APPLICATION FILED JUNE 24, 1907. 5 7 Patented July 1, 1913 4 BHEETBSHEET 3.

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AYPLIOATION FILED JUNE 24, 1907.

1,065,978. Patented July 1, 1913.

4 BHEETSSHEET 4.

WITNESSES. INVENTOR twin ti re.

UNITED STATES PATENT OFFICE.

WILLIAM THOMAS SMITH, F BOLTON, ENGLAND.

TIRE.

To all whomit may concern: it. known that I, WILLIAM THOMAS gS rrn', "{British subject, and resident of fBolton, county of- Lancaster, England, have .6; invented eertain'new and useful. Improve.

'16 tire with anouter ring of canvas, embedded in or cemented together with rubber always maintained in" a state of tension placed upon an inner ring of rubber, (with or without layers of canvas) which is compressed within the canvas outer ring which latter is thereby maintained in a state of constant tension as required. 7 The invention will be fully described with reference to the accompanying drawings forming part of the specification- Figure 1. IS a transverse section of a single tire. 'Fig. 2. is a plan of a single tire either as shown in Fig. 1 or Fig. 7. Fig. 3. is a transverse-section of tire with double row of metal protector plates. Fig. 4. is a transverse section of tire with double row of metal protector plates showing an arrange Iment of taper rings for securing the tire.

Fig. .5. is a transverse section of double or Fig. 6. is a plan of same. big.

7; is a transverse section of cushion tire.

Fig. 8. is a transverse section of cushion tire showing another arrangement for securing same to the wheel. Fig. 9. is a part plan 40 of same.

The tire comprises a ring B of rubber and a ring A of canvas which is maintained in a state of tension and'the rubber in a state of expansion inside it. The ringA of can vas also serves to secure to the tire metal protector plates C and the rubber ring B is held in the desired state of compression by anv inner hoop D.

'- {The tire may be built up in several ways to seou re the desired result.

The ring of rubber B may be constructcd of a suitable diameter and the ring A of eanvas maybe prepared by rolling the can- .vas in layers around a collapsible drum 5 leaving the interior of the ring A somewhat larger than the exterior of the rubber Specification of Letters Patent.

Application'flled June 24, 1907. Serial 'No.-380,571.

around it.

Patented July 1 1913 ring B. The exterior of the rubber ring is coated with rubber solution and by means of a hoop I) is expanded outward into the outer ring A extending the latter to the desired degree. 1 v

In another method of construction the outer canvas ring A is made tothe desired size upon a collapsible drum, and when so made is maintained ina state of tension by a temporary metal'hoop bolted upon its outside by means of the clamping plate E in the interior into which screws are passed from the outside of the temporary hoop. The rubber ring B is then molded and vulcanized within the canvas ring A. When vulcanized the rings A and B aremaintained in the desired state by the insertion of a hoop D within the rubber ring B. The. temporary hoop is then removed and the clamping plates employed to secure the protector plates C.

In: another method of construction the outer canvas ring A- may be made as described and the rubber ring B of a greater external diameter than the interior of the ring A the rubber ring 13 being then compressed into the interior of the canvas ring. If protector plates C are to be employed the clamping plates E are embedded in the rubber ring B. Y

In another method of construction the rubber ring B may-be molded preferably upon a metal hoop D and the layers of canvas to form the ring A be tightly wound The outer-canvas ring "A is preferably fitted with protector plates C secured firmly in position by narrow inner screw or clamping plates 1*) such plates being placed at intervals between the canvas ring A, and

. rubber ring B, secured to the interior of the canvas ring and embedded in the periphery of rthe soft rubber ring. The interval between the parts allows of the rubber ring B being vulcanized to the canvas ring A.

Theouter canvas ring A may at any time be renewed by removing it without destroying or wasting the inner ring of rubber B which is not subject to the samc Working conditions and consequently to less wear and tear. This may be done by cutting the canvas across and stripping it from the rub her and then applying a fresh rin of can vas by either of the methods a ove de scribed.

The clamping plates E are formed with of the ring B. Base plates G may be inserted in the rubber ring B to stiffen it and secure it to the rims.

In securing the protector plates to the canvas ring'I' subject each plate to a pressure considerably over its heaviest-working load the lock screws 0 being screwed down so as to retain the canvas ring A between the plates E-and the protector plate. By thus securing the canvas, heating and wear of the fabric and rubber which would otherwise occur is prevented. The protector plates may be secured in any other manner to the periphery of the canvas ring A.

By maintaining the canvas ring always in a state of tension or without any slackness the defects which would otherwise, arise if the canvas layer were in a normal state around the rubber are obviated. The canvas ring being alread stretched to its limit in building up the ire does not stretch longitudinally as does the ordinary rubber tire surface but is subject to the compressive or radial movement toward the axle which gives the resiliency to a solid or cushion tire. The canvas ring also being in a state of ten sion over and above that set up in the canvas rin by the tractive force applied for propulsion, the substance of the ring is not creased or slackened upon itself, as would be the case if slack or normal on the tire,

by this means disintegration, overheating,

sion, an inner ring of rubber expanded therein, to which the canvas is vulcanized and caused to adhere, and protector plates affixed to the periphery of the canvas ring substantially as described;

- 2. Attire for motor and other road vehicles comprising an outer ring of layers of canvas maintained in a state of constant tension, an inner ring of rubber expanded therein, to which the canvas is vulcanized and caused to adhere, a metallic hoop,

within the rubber ring by which the rubber is compressed or expanded against the canvas to maintain the tension thereof, and protector plates afiiXed't-o the periphery of the canvas ring substantially as described.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

WILLIAM THOMAS SMITH. Witnesses:

J. OWDEN OBRIEN, I'IARRY BARNFATHER 

